I cant upgrade glibc from 2.11.2-r3 to 2.15-r3. During configure it prints error 'configure: error: linker with -z relro support required'. I've tried to install newer gcc and binutils but it wont help.

That bug doesn't look fully relevant. Part of it is about cross compiling, the initial report is about old versions of toolchain.
Though checking the command, configure uses in the check, would be a start.